Station battery charge and discharge control valve, control method and system

The invention relates to the technical field of batteries, and discloses a station battery charge and discharge control valve, a control method and a system. The station battery charge and discharge control valve comprises a control execution module and a port module. The control execution module is used for detecting the running state of the battery; the control execution module is connected with a charging loop to charge the battery when the running state of the battery is a charging state; the control execution module is connected with a discharge loop to discharge the battery when the operation state of the battery is a discharge state; and the control execution module is connected with a power supply loop to supply power to the battery when the running state of the battery is power supply. By detecting the port voltage in real time, the running state of the battery is determined, the corresponding loops are connected in different running states and corresponding operation is performed on the battery, the